Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7fe94a6366be7b5…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 10:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee5e3d3f83a87308d710e56b4d8e17c SHA-1: 6cd5831926e460d605fb850dcaae8cd352e08963 SHA-256: f7fe94a6366be7b5a9585bcfdc859db125f00b7167702b38d175cb85e41bffc3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to Shopify domains with book-related slugs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL as the redirector, indicating the primary intent is to lure the user to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=oracle%20certified%20java%20programmer%208%20book%20pdf
    • http://files.stpetersmountainlakes.org/uploads/1/3/0/7/130775306/binuweraxupafavev.pdf
    • http://files.oleanbarbershopchorus.org/uploads/1/3/1/3/131380295/wedijelesopet.pdf
    • http://basakoda.sunnibunni.com/uploads/1/3/0/8/130874655/c5b64c1a7f.pdf
    • http://files.palmsandholley.com/uploads/1/3/1/3/131380345/e2d86759ed3.pdf
    • http://files.micahmakespots.com/uploads/1/3/0/7/130776257/muketika_tisisepagenode_zifikejam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/saxagivabixumusiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0451/8169/8199/files/pimodako.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8023/files/weromefujati.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/33352457716.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/sinusoidal_function_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/adobe_writer_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/bayesian_deep_learning.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/ignou_bsc_maths_syllabus.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000768f.bin
d281dc1ef8c5da155d4e24f8b646a5390ec045e8fd2f38e5c0daa8d3c9a27ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768F 5860 bytes
font_01_sfnt_off00008a73.bin
523029057d1dc17547636929a51f225d576fef33304a385f753d1bb393b9f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 11396 bytes

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